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even old ones of those still command a huge price tag, if you can find one.
an M90 is a $100 supercharger at junkyards and takes another $100 to rebuild one.
to me at least the real attraction of the roots-type is the instant response and low/mid range power gains achievable.
a 944 is in desperate need of low-end power, IMO...so this is an easy way to get there.
You are correct but ease of installation is worth a lot of time. I guess it comes down to how much free time vs money etc. How much is a 3.0L build? How long will a stockish 2.5 survive boost? Either way it ought to be fun and a huge learning experience.
How long will a stockish 2.5 survive boost? Either way it ought to be fun and a huge learning experience.
It will be fine provided that fuel and spark are controlled and dialed in properly.
Most installations just slap in a power adder but do not address management properly or more precisely, not at all.
The centrifugal superchargers look like a great idea, but you have to remember that they're not positive displacement. You won't have boost off the line.
Spencer...PM me how much you're looking to get for those M90 parts, intake and all. I'm just curious more than anything, the NA motor is running perfectly and I need to shoot myself in the foot somehow.
The centrifugal superchargers look like a great idea, but you have to remember that they're not positive displacement. You won't have boost off the line.
Spencer...PM me how much you're looking to get for those M90 parts, intake and all. I'm just curious more than anything, the NA motor is running perfectly and I need to shoot myself in the foot somehow.
Different isn't bad. Centrifugal allow for same driveability but plenty of power when wanted. In a lot of applications centrifugals end up being more powerful for the same boost. Torque off the line only matters in the first part of a drag race. If you are supercharging a 944 for drag racing there are much better solutions.
the NA motor is running perfectly and I need to shoot myself in the foot somehow.
i get that, completely.
Originally Posted by AnthonyGS
Torque off the line only matters in the first part of a drag race. If you are supercharging a 944 for drag racing there are much better solutions.
it matters just as much for normal street driving...a stock 2.5l 8-valve 944 makes at best ~140 lbft of torque @ 3000rpm which is *just enough* to get a not-so-light car like a 944 moving and up to speed. but there's a definite "gap" of power off idle until you get to the good part of the torque curve...
a PD blower with just enough throttle will be adding some boost (depending on how your bypass is setup) to get you going easier...
different strokes for different folks though, i can get the appeal of the centri style if you've got a car with sufficient low-end (968) but it's not what i want for my car.
So here is the belt tensioner, or rather idler as tension will be applied via the stock alternator tensioner.
Rather conveniently the alternator pivot bolt is in a great location to provide a mounting spot that will ensure plenty of belt wrap on the supercharger pulley.
With all that, I must comment on the beauty of the alternator mount..looks like it was CNC'd. Nice welds too...perhaps it's just an optical illusion, but does the blower belt line up with the other pulleys well? Looks like the blower is set too far forward in it's relation to the other pulleys..?? No Gilmer timing belts here..LOL!
Odonnell - you'll need to get a Jaguar XJR-6 supercharger to use that bracket, FYI.
I've asked him about one too - maybe we can split shipping from AU?
Blower choice isn't a big deal to me, I don't have one at all. I wasn't really planning on any more performance projects for this car until my 951 is on the road, but if the price is right...supercharging was my original plan until the 951 sort of fell into my lap.
And yeah, I'm game to split shipping.
So here is the belt tensioner, or rather idler as tension will be applied via the stock alternator tensioner.
Rather conveniently the alternator pivot bolt is in a great location to provide a mounting spot that will ensure plenty of belt wrap on the supercharger pulley.
DAYUM! Crazy fabrication! Thanks for sharing! Gives me alot of ideas for my build!
08-20-2017, 09:40 PM
